Sulfamoyl urea derivatives

Abstract

The invention relates to herbicidally active sulfamoyl urea derivatives, including herbicidal formulations and uses thereof to control the growth of noxious plants, i.e., weeds.

I claim: 
     
       1. A compound represented by the formula: ##STR5## wherein: Z is CH; R 1  and R 2  are the same or different and represent halogen or C 1  to C 6  alkyl, or alkoxy;   R 3  and R 4  are the same or different and represent hydrogen, C 1  to C 4  alkyl, alkoxyalkyl, haloalkyl, or up to C 3  alkenyl or alkynyl;   R 5  is hydrogen, halogen or C 1  to C 4  alkyl or haloalkyl; and   R 6  is methyl or ethyl.   
     
     
       2. A compound of claim 1 wherein R 1  is lower alkyl, R 2  is lower alkoxy, R 3  R 4  and R 5  are hydrogen and R 6  is methyl. 
     
     
       3. A herbicidal formulation containing an agronomically acceptable carrier and a compound or mixture of compounds defined in claim 1. 
     
     
       4. In a method of controlling weeds wherein a herbicidally effective amount of herbicide is applied to a growth medium prior to emergence of weeds therefrom or to the weeds subsequent to their emergence from the growth medium, the improvement residing in using as the herbicide a compound or mixture of compounds defined in claim 1.